/**
演示页面css
 */
body, html {
    overflow: hidden;
    margin: 0;
    height: 100%;
    width: 100%;
}

body {
    font-family: 'Roboto Mono', monospace, 'Microsoft Yahei';
    color: #333
}

#wrapper {
    position: absolute;
    width: 320px;
    text-align: center;
    top: 50%;
    left: 50%;
    margin-left: -160px;
    margin-top: -160px;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none
}

h1 {
    font-weight: 700;
    font-size: 30px;
    letter-spacing: 9px;
    margin: 12px 0;
    left: 4px
}

h2 {
    color: #000;
    font-weight: 400;
    font-size: 15px;
    letter-spacing: .12em;
    margin-bottom: 30px;
    left: 3px
}

h1, h2 {
    position: relative
}

p {
    font-size: 14px;
    line-height: 2em;
    margin: 0;
    letter-spacing: 2px
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    pointer-events: none
}

a {
    color: #54565d;
    text-decoration: none;
    transition: color .2s ease
}

a:hover {
    color: #f33
}